Refractory tile and plug fitting.



H. H. NEVANAS.

REFRACTORY TILE AND PLUG FITTING.

APPLICATION FILED JAN. 20, 1913.

Patented Dec. 9, 1913.

2 SHEETS-SHEET 1.

COLUMBIA PLANOGRAPH C0,, WASHINGTON. D c,

H. H. NEVANAS.

REFRACTORY TILE AND PLUG FITTING.

APPLICATION FILED .TANJZO, 1913.

Patented Dec. 9, 1913.,

2 SHEETS-SHEET 2.

COLUMBIA PLANOGRAPH c0,,wAsmNaTON, n. c.

UNITED EATFE PATNT @FIQE.

UNITED GAS IMPROVEMENT A CORPORATION OF PENNSYLVANIA.

REFRACTORY TILE L8IL7I 5. Specification of COMPANY, OF PHILADELPHIA, PENNSYLVANIA,

AND PLUG FITTING.

Letters P t n Iatented Dec. 9,1913.

Application filed January 20, 1913. Serial No. 743,098.

To all whom it may concern Be it known that I, HAROLD II. NEVANAS, a subject of the King of England, but having declared my intention of becoming a citizen of the United States, and residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a certain new and useful Refractory Tile and Plug Fitting, of which the following is a specification.

In many branches of the arts use is made of fiues and furnace chambers or passages from which air must be excluded and which should, from time to time, be inspected. The gas passages of the recuperators of coal gas retort settings are an example of such fines and furnace chambers or passages and ordinarily their cleaning openings are closed by tiles provided with openings fitted with detachable sight plugs. These tiles are so set in the wall that they are frequently broken in their removal, and the plugs are cylindrical and are fitted in cylindrical holes in the tiles. Both the plugs and tiles are luted, and the luting makes the removal of the plugs difiic'ult, and the tightness of the joints uncertain, because luting often looks all right from the surface, but as a matter of fact permits of the ingress of air, and in the case cited by way of example the ingress of air burns the carbon monoxid to carbon dioxid and thus interferes with and unbalances the operation of the bench.

Objects of the present invention are to obviate the above mentioned difficulties and disadvantages and to provide a refractory tile and sight plug setting which can be readily opened and tightly closed, without the use of luting or clay and without danger of breakage.

The invention will be claimed at the end hereof, but will be first described in connection with the embodiments of it chosen from among other embodiments for illustration in the accompanying drawings, in which- Figure 1, is a front view, and Fig. 2, a view principally in central section illustrating a refractory tile and plug fitting embodying features of the invention. Figs. 3 and 4 are similar views illustrating a modification. Figs. 5, 6, and 7, are a front, a side and an end view, partly in section, of the plug adapted for cooperation with the tile shown in Figs. 3 and 4. Figs. 8 and 9 are a front and sectional View illustrating another modification. Figs. 10 and 11 are a front and side view of a. plug adapted for cooperation with the tile shown in Figs. 8 and 9, and Fig. 12, is a view, partly in elevation and partly in section, illustrating the modification of the invention shown in Figs. 8 to 11 in application to a gas retort bench.

Referring to Figs. 1 and 2, 1 is a refractory wall fitting having a circular opening 2 through it. The shape of the wall fitting is immaterial as it is a permanent part of the flue or furnace chamber. 3, is a refractory tile having a circular opening fl: through it and having an externally cylindrical stem 5 adapted to the circular opening 2 of the fitting 1. 6, is a refractory sight plug having a cylindrical stem 7 adapted to the opening 4. There are screwand-thread connections 8 and 9, respectively bet-ween the stem of the tile and the fitting and between the stem of the plug and the tile. 10 and 11 are washers affixed respectively on the stems of the plug and tile. 12 is a projection on the plug whereby it may be turned and 13 are recesses in the tile whereby it may be turned, for example, by means of a spanner.

As shown in Figs. 3 and 1, and 8 and 9, the tiles 3* and 3 are square and the screwand-thread connections between them and the wall fitting 1 and 1 are omitted.

In Figs. 3 to 7, the screw-and-thread connection between the plug and the tile assumes the form of a bayonet joint 14, and the front of the plug is recessed at 15 to facilitate turning it.

As shown in Figs. 8 to 11, the construction is as has been described in connection with the other figures, and the tile is square and the plug is the same as in Figs. 1 and 2.

In Figs. 8, 9, and 11, 9 is one element and 9 is the other element of the thread and screw connection.

The described refractory tile and plug fitting may, among other uses, be applied at the ends of the gas fines, passages or chambers 18 of a gas retort setting, of which a type is illustrated in Fig. 12. To remove a sight plug it is simply unscrewed and lifted out of the tile whereupon the operator may look through the hole in the tile.

The presence of the screw-and-thread connection greatly facilitates the removal of the plug because the operation of turning the plug backs the Washer 10 off from its seat 16 in the tile, which seat is formed by the bottom of a circular concavity in the face of the tile. The plug is replaced by inserting its unthreaded end 17 in the hole in the tile and then giving it a turn, with the result that its washer 10 is drawn tight onto the seat 16, thus making a tight joint which prevents ingress of air.- The described operations of removing and inserting the plug can be rapidly and easily performed and a tight oint insured without danger of breakage of any of the parts, It may be remarked that the tiles are usually hot so that when the plug is removed it cools and contracts and since it may be rapidly inserted in the tile it does not become hot until its washer is well seated and after the washer is seated the plug in heating up expands and thus tightens the washer which assists in procuring a joint sufiiciently tight to exclude air even though the interior of the fiue or chamher is below atmospheric pressure. In order to clean the chamber, flue or passage and in the embodiment of the invention shown in Figs. 1 and 2, the tile is unscrewed and after the cleaning operation again screwed to place, and as in the case of the plug, there is no danger of breakage and the washer provides a tight joint.

From the foregoing description it is evident that no luting or clay is necessary, so that the breakage and leakage consequent upon the use of luting or clay is avoided and the operations of inspection and cleaning are so simplified that they can be readily performed with that frequency which is both necessary and desirable to the attainment of the best results in many arts and processes.

It will be obvious to those skilled in the art to which this invention relates that modifications may be made in details and construction of arrangements, hence I do not limit my invention in those matters nor in any way other than the prior state of the art may require, but

\Vhat I claim as new and desire to secure by Letters Patent is:

1. A refractory tile-and-plug flue or furnace fitting comprising the combination of a tile having a circular opening through it and having a concavity the bottom of which constitutes a seat, a refractory sight plug having a cylindrical stem adapted to the circular opening and a head adapted to said seat, screw-and-thread connection integral with the stem of the plug and the tile, a washer encircling the stem of the plug be tween said head and seat, and means whereby the plug may be turned, substantially as described.

2. A refractory tile-and-plug flue or furnace fitting comprising the combination of a refractory wall fitting having a circular opening through it, a tile having a circular opening through it and having an externally cylindrical stem adapted to the circular opening of the fitting and having a con cavity the bottom of which constitutes a seat, a screw-and-thread connection integral with the fitting and tile, a refractory sight plug having a cylindrical stem adapted to the circular opening in the tile and a head adapted to said seat, screw-and-thread connection formed on the stem of the plug and on the tile, a washer encircling the stem of the plug between said head and seat, and means whereby the plug may be turned, substantially as described.

In testimony whereof I have hereunto signed my name.

HAROLD H. NEVANAS.

Witnesses:

CLIFFORD K. CAssnL, F RANK E. FRENCH.

Copies of this patent may be obtained for five cents each, by addressing the Washington, D. C.

Commissioner of Patents, 

